My proposed idea is to do with builders huts, as we all know upgrading everything is quite time consuming, wouldn't it be nice if we could speed this process up without gems.
My idea is that we can upgrade builders huts to level 2, the cost would be somewhere around the area of 500,000 gold to 750,000 gold. By upgrading the builders huts it would decrease the time taken for an upgrade to complete by 25%.
The builders huts themselves would take 2 days to upgrade.
I personally believe this would be a great addition to the game.
Thanks for your interest in my idea.